The purchasing power parity (PPP) theory uses the long-term equilibrium exchange rate of two currencies to equalize their purchasing power. Developed by Gustav Cassel in 1920, it is based on the law of one price: the theory states that, in an ideally efficient market, identical goods should have only one price.
This purchasing power exchange rate equalizes the purchasing power of different currencies in their home countries for a given basket of goods. Using a PPP basis is arguably more useful when comparing differences in living standards on the whole between nations because PPP takes into account the relative cost of living and the inflation rates of different countries, rather than just a nominal gross domestic product (GDP) comparison. The best-known and most-used purchasing power parity exchange rate is the Geary-Khamis dollar (the "international dollar").
PPP exchange rates (the "real exchange rate") fluctuations are mostly due to market exchange rates movements. Aside from......

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Title: The Purchasing Power Parity
Approximate Word Count: 3045
Approximate Pages: 13 (250 words per double-spaced page)

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